jQuery 实现页面向下滚动右下侧才出现返回顶部

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html:

<div class="gallery">
    <img src="images/zhizhen.png" alt="">
</div>

css:

.gallery{ width: 60px; height: 60px; position: fixed; z-index: 10; bottom: 60px; right: 20px;display:none; }

.gallery img{ width: 60px; height: 60px; }

jQuery:

function rightBar() {
    $(window).scroll(function () {
        var scroll_top = $(document).scrollTop();
        console.log(scroll_top)
        if (scroll_top > 230) {               //当向下滚动230px时,出现返回顶部链接
            $(".gallery").show(300);
        } else {
            $(".gallery").hide(300);
        }
    });
    $(".gallery").click(function () {
        $("html,body").animate({scrollTop:0}, 500);
    });
}
rightBar();

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转载自blog.csdn.net/qq_41229582/article/details/82017838